36949-57-2Relevant academic research and scientific papers
Asymmetric organocatalytic direct C(sp2)-H/C(sp3)-H oxidative cross-coupling by chiral iodine reagents
Wu, Hua,He, Yu-Ping,Xu, Lue,Zhang, Dong-Yang,Gong, Liu-Zhu
supporting information, p. 3466 - 3469 (2014/04/03)
An asymmetric organocatalytic direct C-H/C-H oxidative coupling reaction of N1,N3-diphenylmalonamides has been well established by using chiral organoiodine compounds as catalysts, wherein four C-H bonds were stereoselectively functionalized to give structurally diverse spirooxindoles with high levels of enantioselectivity. More importantly, the findings indicated that chiral hypervalent organoiodine reagents can serve as alternative catalysts for the creation of enantioselective functionalization of inactive C-H bonds. 'I' on the ball: The title oxidative coupling reaction of N 1,N3-diphenylmalonamides has been established by using chiral organoiodine compounds as catalysts. Four C-H bonds were stereoselectively functionalized to give spirooxindoles with high levels of enantioselectivity.
Phenyliodine bis(trifluoroacetate)-mediated oxidative C-C bond formation: Synthesis of 3-hydroxy-2-oxindoles and spirooxindoles from anilides
Wang, Junwei,Yuan, Yucheng,Xiong, Rui,Zhang-Negrerie, Daisy,Du, Yunfei,Zhao, Kang
supporting information; experimental part, p. 2210 - 2213 (2012/06/18)
The reaction of phenyliodine bis(trifluoroacetate) (PIFA) with a series of anilides 1 (E = CO2Et) in CF3CH2OH was found to give 3-hydroxy-2-oxindole derivatives 2, while that with various anilides 1′ (E = CON(R4
Solvent extraction of metal ions from nitric acid solution using N,N′-substituted malonamides. Experimental and crystallographic evidence for two mechanisms of extraction, metal complexation and ion-pair formation
Chan, Gabriel Y. S.,Drew, Michael G. B.,Hudson, Michael J.,Iveson, Peter B.,Liljenzin, Jan-Olov,Skalberg, Mats,Spjuth, Lena,Madic, Charles
, p. 649 - 660 (2007/10/03)
The solvent extraction of actinides including AmIII and CmIII together with some trivalent lanthanides from nitric acid solutions by two newly synthesized malonamides, N,N′-dimethyl-N,N′-diphenyltetradecylmalonamide (dmptdma) and N,N′-dicyclohexyl-N,N′-dimethyltetradecylmalonamide (dcmtdma) has been investigated and : compared with data for the reference malonamide, N,N′-dibutyl-N,N′-dimethyloctadecylmalonamide (dbmocma). The dependence of the extraction on the nitric acid and malonamide concentrations together with the probable molecular structure of the extraction species from nitric acid solution suggests that there are two principal mechanisms of extraction. For low nitric acid concentrations (up to 1 mol dm-3) a co-ordinative mechanism dominates for the extraction of metal cations, whereas at higher nitric acid concentrations (1-14 mol dm-3) an ion-pair mechanism involving the mono- or di-protonated malonamide and the metal anions [M(NO3)4]- or [M(NO3)5]2- appears to be more important. Crystal structures show that in the protonated, unalkylated species Hdcmma + (dcmma = N,N′-dicyclohexyl-N,N′-dimethylmalonamide) and in the chelated complexes [Nd(NO3)3(dcmma)2], [Nd(NO3)3(H2O)2(dmpma)] and [Yb(NO3)3(H2O)(dmpma)] (dmpma = N,N′-dimethyl-N,N′-diphenylmalonamide) the carbonyl oxygens lie cis to each other suggesting that it is the cis form which is involved in extraction. However, crystal structures of the free unalkylated malonamides N,N′-dicyclohexyl-N,N′-diethylmalonamide and N,N′-dicyclohexyl-N,N′-diisopropylmalonamide show that the carbonyl amide groups adopt a trans configuration in which the carbonyl oxygens are at maximum separation. By contrast, in the crystal structure of the diphenyl derivative dmpma the carbonylamide groups adopt a gauche configuration with an O=C ... C=O torsion angle of 57.2°. Conformational analysis confirms that the differences in these structures reflect the differences between the lowest-energy gas-phase conformations and are not caused by packing effects.
Preparation of New Vicinal Tricarbonyl Compounds and Some of Their Sulfur Analogues
Malmberg, Wolf-Dieter,Voss, Juergen,Weinschneider, Sabine
, p. 1694 - 1711 (2007/10/02)
Mesoxalamides 5, benzoylglyoxylamides 19, and pivaloylglyoxylamides 26 are prepared from the corresponding malonamides 4, benzoylacetamides 17 and pivaloylacetamides 24, respectively, by suitable oxidation reactions.Some of the sulfur analogues of 5,19, a
